Wrench



E. BROWN.

WRENCH.

APPLICATION FILED APR. 14, 1921.

1 0 5 1 Patented Feb. 14, 1922.

PATENT orrics.

EDWARD BROWN,OF HARTFORD, CONNECTICUT.

WRENCH.

1,4.oe,5a1.

Specification of Letters Patent,

Patented Feb. 14, 1922.

Application filed April 14, 1921. Serial No. 61,220.

T 0 all whom it may concern:

Be it known that EDWARD BROWN, a citizen of the United States,residingat Hartford, in the county of Hartford and State of Connecticut,has invented certain new and useful Improvements in renches, of whichthe following is a specification.

This invention relates to wrenches. I should state that this title isadopted somewhat for convenience because the article can be used forother purposes such for instance as pliers or as a handle ormanipulating portion for various kinds of implements. I have a number ofobjects in view among them being the provision of an implement of thecharacter identified, which is capable of inexpensive construction andwhich can be readily and easily operated to change its adjustments, andwhat is most important can be held positively against accidentalmovement in an adjusted position and virtually locked in such relation.

In the drawings accompanyingand forming part of the presentspecification, I have shown in detail one of the'several forms ofembodiment of the invention which to enable those skilled in the art topractice the same will be set forth fully in the following'description.I may depart therefrom -in a number of respects within the scope of theinvention defined by the claims following said description.

Referring to said drawings:

Figure 1 is a plan view of a tool involving the invention, the dottedlines showing different adjustments.

Fig. 2 is a side elevation of the tool as seen for instance from belowin Fig. 1.

Fig. 3 is a view corresponding to 1 of the wrench with a shank of a toolin locked relation between the jaws thereof.

Fig. 4: is an elevation as seen for instance from the right in Figs. 1,2 and 3.

Like characters refer to like parts throughout the several views.

The wrench involves in its makeup two main members which can be relatedto each other in any one of several difierent ways. Generally they arepivoted together. At their forward or head ends they are equipped withjaws usually integral with the respective main or carrying members. Thelevers are usually crossed and where they cross are pivotally united bya suitable pivot forward of which are the jaws which are customarilyintegral with the respective levers.

The tail or outer end portions of the levers are preferably furnishedwith extensions or lugs which are generally in superimposed relation andwith which clamping means of a suitable nature is associated so that thelugs when desired may be clamped rigidly together to maintain positivelyan adjustment of the jaws. The jaws can therefore be locked closed totightly hold an article such as a nut of any size within the span of thejaws. The jaws can also be locked in posi tive engagement with tools ofvarious kinds such as screw-drivers, gimlets and chisels. The articlecan also be used as a valve lifter and is especially advantageous whenapplying or removing nuts which is of particular advantage when the nutis in a diflicult position.

The wrench comprises. in its makeup two carrying or mainmembers, and thelevers 2 and 3 answer satisfactorily in this particular. These leverscross and where they cross they are pivotally united as by the pivot orstud a which may consist of a screw furnished with a removable nut 5.The levers 2 and 3 forward of their point of connection are furnishedwith heads 6 and 7 which when closed to the full extent nearly abut attheir free ends. their inner sides the recesses or apertures 8 whichregister or match as shown for instance in Fig. 4; in order to receivethe shank or body of an implement or tool 9 the butt end of which fitsthe pocket 10 formed in the base portions of the jaws or heads 6 and 7as shown for example in F ig. 3. This prevents any wabbling motion ofthe tool 9 while it is being turned or moved longitudinally to either ofwhich motions it may in practice be subjected.

The rear or tail ends of the crossed levers 2- and 3 are furnished withlugs or extensions 11 and 12 which are superimposed and which fitfiatwise against each other as shown for example in Fig. 1. Said lugs orextensions have in them longitudinally extending slots 13 which coincideand which are formed on arcs concentric with the axis of the pivot 4.The slots conform in shape to that of the lugs or extensions 11 and 12.

Fitted in the registering slots 13 is a thumb screw 14 the head of whichengages against what is shown asthe under side of the lug or extension11 the screw 14: as illustrated having in threaded engagement with itthe winged thumb nut 15.

The jaws have on In Fig. 1 the full lines show the wrench as locked inan adjusted position at which time the thumb nut 15 is set and bindssubstantially against the upper lug or extension 11 the head of thescrew 1% bearing equally substantially against the under surface of thelug or extension 11 by reason of which the heads or jaws 6 and 7 cannotbe accidentally opened or closed. By loosening the thumb nut the jawscan be moved toward or from each other by the contraction or expansionof the levers 2 and 3 as shown by the dotted lines in Fig. 1 and whenthe changed adjusted position is obtained it can be maintained bytightening the nut 15.

In Fig. 3 I have shown how the shank of a tool which may be of anysuitable kind can be firmly clamped between the jaws or heads 6 and 7and the relation positively held by setting the nut 15.

It will be seen that the jaws 6 and 11 have lateral offsets as 6' byreason of which there is between the outer faces of the ofi'sets and theadjacent faces of the cross levers 2 and 3, space in which the fingersof a hand can be situated when the jaws are employed for instance forremoving nuts generally in inaccessible places.

What I claim is:

1. A wrench of the class described comprising two crossed levers pivotedto each other for adjustment and having jaws at one side of the pivot,the levers having inwardly extending overlapping contacting lugs at theopposite side of the pivot, and means carried by both of the lugs, forlooking the levers in an adjusted position.

2. A wrench of the class described comprising two crossed leverspivotedto each other for adjustment and having jaws at their free ends, thelevers at their tail portions having inwardly extending overlapping lugsfurnished with slots, and a thumbscrew extending through the slots andthe head of which engages one of the lugs, the screw having a nut toengage against the other lug.

3. A wrench of the class described comprising two crossed levers pivotedto each other for adjustment and having jaws at their free ends, thelevers at their tail portions having inwardly extending overlapping lugsfurnished with slots, and a thumbscrew extending through theslots andthe head of which engages one oi the lugs, the screw having a nut toengage the other lug, the jaws having lateral ofiset portions whichextend outward beyond the outer sides of the levers. 1

4. A wrench of the class described comprising two crossed levers pivotedto each other for adjustment and having jaws at their forward ends, thelevers back of the pivot having overlapping lugs furnished with slotswhich are formed on arcs concentric with the axis of the pivot, and athumb-screw extending through the slots and the head of which engagesone of the hugs, the screw having a nut to:- engage against the otherlug.

5. A wrench of the class described comprising two crossed levers pivotedto each other for adjustment and having jaws at their forward ends, thelevers back of the pivot having overlapping lugs furnishedwithslotswhich are formed on arcs concentric with the axis of the pivot,and a thumb-screw extending through the slots and thehead of whichengages one of the lugs, the screw having a nut to engage against theother lug, the jaws having recesses which coincide to receive the buttportion of a tool between the jaws.

In testimony whereof I afiix my signature. EDWARD BROWVN.

Witnesses:

Ensna M. RABnNs'rEIN, HEATH SUTHERLAND.

